The diamond drill. (Crystal Falls, Iron County, Mich.) 1887-1996, 1887-04-16
NUGGETS OF NEWS FUSED IN THE
DIAMOND DRILLS CRUcIBLE.
fn Interesting drficie by Prof. r. ~. Brooks.
Crystal Falls Water Power 10 De Ufiiired.
Market Reports The Dunn Mine
Spurrommeaeed--Sec 30, a.
81, 90 De Explored on Chicago
Parfies--Prospects on Sec
fion s3 Frightening.
Numerous Notes.

The following from the pen OF Prof Il.
b. Brooks, on the subject of boulders or
float ore, is OF much interest The
writer says: Fragments OF iron ore
which have been detached from the heparent
ledge and are found loose on the surface,
or in the drift beneath, possess great in-
terest TO the explorer, and are among
the most important helps and guides.
The same remarks are applicable, but to
less extent, to the boulders OF other
rocks. Asa rulein the ironregion OF Lake
Superior it is safe TO assume that when
boulders OF particular ore abound on
the surface, a ledge OF the same will be
found in place, very near-if not immed-
lately under the boulders, then up the
hill from them or perhaps little TO the
north or east. The more angular or
sharp cornered the boulders, the nearer
we would expect to find the ledge. In
the Menominee region, il may almost be
said that this rule il invariable, as there
seems to have been less movement OF the
drift material here than farther TO the
north. In the Michigamme district n
large quantity OF float ore is found some
distance south of the iron range. Some
OF the pieces are very large and contain
one hundred tons OF ore. Considerable
digging has been done near some OF the
largest OF these boulders, but without find
ing ledge Of ore, and the magnetic attrac-
tionis such as would indicate detached
boulders and not a continuous ledge.
These boulders are all found south Of the
Michigamme iron range, which produces
them, and but few at distance OF more
than two and one halfmiles, most OF them
being nearer. The direction OF the drift
In the Upper Peninsula OF Michigan is un-
iversally southerly and westerly. There
fore, II iron boulders be found i'm consider
able abundance the explorer may assume,
especially il they are angular that he has
iron underneath thesurface. 1.-THE bould-
ers are magnetic the location OF the ledge
ought TO be quite easily determined by the
use OF the dipping needle but IL they are
specular the location OF the ledge may be
an expensive and difficult thing to deter
mine Soft hematite from itsnature, can
never occur in the form OF boulders, as IL
would weather into reddish soil Iron
boulders are often met with in digging test
pits and shafts. In such instances, IL
near the ledge the ore is generally found
in place very near; il considerably
above il in the drift, the same rule would
apply as TO surface boulders. Attention
should be given to the character OF fbould-
ers other than iron, which may be asso-
ciated with il, or found where there ism
iron. Occasional granite boulders occur
everywhcrein the Lake Superior iron re-
gion and have no economic significance.
An abundance Of granite boulders, how
ever, never occur except overg granite rocks
and so far these rocks havonot produced
workable deposits OF iron ore. Boulders
OF quartzite diorite and slate usually ac-
company iron in the Marquette region
and marble boulders as well as quart
rite are most significant in
the Menominee region. The above
laws regarding the occurrence Of iron
boulders give the facts regarding their
geographical distribution great import
ance in iron explorations. II, where there
are iron boulders, we may confidently
look for iron, then conversely where there
arenone we eshouldnot expect TO find iron.
IL ia not meant to assert that every de-
posit OF hard ore Is marked by float or
boulders, but 80 far as the facts now APP
pear, this Is the case In the above regions
referred TO-"
While transactions in the iron ore mar
ket show an increase over those OF the
former week, they are mainly for small
lots and nothing in access OF 5000 OF
10000 tons has, apparently, transpircd.
Dealers have had more business In the
aggregate. sales are made at quoted
prices and options out have been nc
cepted. We fail TO find yet any evidences
Of weakness, and prices remain at last
weeks quotations. Rail freights 10 the
Mahoning, Shenango. and Tuscarawas
valleys have been established at eighty
five cents TO Pittsburgh and Allegheny
county S15O, and Johnstown district